Siemens SIMATIC ET 200pro Original Instructions Manual page 149

NOTICE
Risk of damage to equipment due to grounding of motor connecting cable
The connections for the temperature sensor and the motor holding brake are switched to
the minus potential of the DC link. If you ground these connections, you will damage the
converter.
• Use cables with suitable insulation.
• Isolate unused cables individually.
• The unused cables must not be grounded.
Connect the cables for the motor
holding brake as follows to the X2
connector of the Power Module:
• Terminal 4 – Brake (-)
• Terminal 6 – Brake (+)
If the motor holding brake is connected via the Power Module with the converter, the motor
holding brake is supplied with 180 V DC and the converter monitors the proper functioning of
the brake.
Function after OFF1 and OFF3 command
The inverter controls the motor holding brake in the following way:
● After the ON command (to switch on motor), the inverter magnetizes the motor.
● After the magnetizing time (p0346), the inverter issues the command to open the brake.
● The inverter keeps the motor at a standstill up until the end of the time in p1216. The
motor holding brake must open within this time.
● At the end of the brake opening time the motor accelerates to the speed setpoint.
● After the OFF command (OFF1 or OFF3) the motor brakes to a standstill.
● When braking, the inverter compares the speed setpoint and the actual speed with the
speed threshold p1226:
If the speed setpoint falls below the threshold p1226, the inverter starts the time p1227.
If the actual speed falls below the threshold p1226, the inverter starts the time p1228.
● As soon as the first of the two times (p1227 or p1228) has elapsed, the inverter issues
the command to close the brake.
The motor comes to a standstill but remains switched on.
● After the brake closing time p1217, the inverter switches off the motor.
The motor holding brake must close within this time.
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2015, FW V4.7.3, A5E34257324B AB
Setting functions
8.7 Application-specific functions
149